of watkins



j @ni-teh 'gratter Iiig-attriti @Hirn METHODS 0F UNITING STOVE- PIPES, die.

titte rlgrhnls n fwrri lutin ilunertiers @anni mit mating pntt'nf'tlg time.

'ro ALL WHOM 1T lMAY,concerns;

Be it, known that I, A. B. HUnIn'ot AWntkins` in the. county of Schuyler, and State of New York, have I invented certain new and improved VMethods of Uniting Joints of ipe; and do hereby declare thntthe following is a clear, full, and exact description thereof,` reference. being had to the accompanying drawings, innking part of this specification, nmlV to the lettersof reference mnrkecl thereon, like letters indicating like verts wherever they occur, 1

Figure -1is a side View of' two pieces partially locked together. Figure 2 is an end view showing the parts in the ,act of being-united'. Figure 3 is an end View of the same completely united. Figure 4, an end view-oi` a.- single piece. I Figure represents a modification of the niethod of uniting the joints. t I takean ordinary piece lof stove pipe orv any similar tube that it is desired to unite, and form n. bead near yits end, ns represented by n and e, iig. 1; nA and B representing the adjoining ends of' two pieces of pipethat it is desired-to unite. I then out n narrow slit, z, in the end -of'ench joint, :is shown in figs. ff andi, and they are then ready to put together.' To -unite them they are vplaced together :is represented in iig. 2, the end of ezichjoint being insertedin the slit h of its fellow. When thus inserted they are turned in opposite directions, by 4which operation'jthejoint B is slid mrer'thejoint A, es represented in tig. 3, the bende, on joint A, fitting into the corresponding bend n, on joint B, end thus locking the'joints firmly together. To unlock them the edge m', of joint B, is sprung in so as to engage under the edge m, of joint A, and turn them in n reverse direction, as indicated in fig. 3, until they are brought again .to the position shown in iig. 2, when they can be ienilily separated'. Fig. 5 represents a modification of this plan of uniting the joints. In thisplan no slit is cut in thejoints, but instead, I form a groove, c, around the inner joint, and then extend from this groove c to the-end of the pipe two or more grooves, b, at right angles to c, os shown, corresponding with the positions of these grooves b. I then i'orm indentations ain the opposite joint; these indentntions producing projections on the inner side of thejoint. V The two joints are tillen shoved together endwise, the projection a sliding in the groove b until it contes opposite the groove c, when the two joints A and B are turned in opposite directions and thus locked together. It is obvious `that the first plan locks the joints'more securely, as the bead e iits and holds in the bead n all around; while in the latter onse' the `projections a only hold in the groove c.

Hziving thus described my invention, what lI' claim, is v 1. Uniting joints of stove pipe by means of the projections mde by the indentntions a on one piece being shoved longitudinally in the groove b of the opposite piece, and then turned into the circumferential groove c, as shown and described. l i

2. ,I claim uniting'joiuts of pipe by means ofthe circumferential beads e and'n, and the narrow slits h, when arranged for joint operation as herein described.

A. B. HURD.

Witnesses i Geo: C. Summen, WM. Hemmnisse. 

